intrinsic coagulation pathway

in·trin·sic co·ag·u·la·tion path·way

(in-trin'zik kō-ag'yū-lā'shŭn path'wā)
A part of the coagulation pathway that is activated by contact of coagulation proteins with negatively charged surfaces. All components are within the bloodstream and include factors XII, XI, IX, VII, HMWK, and prekallikrein. The activated partial thromboplastin time tests for abnormalities in this pathway.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
As part of this launch, Novartis (NVS) has licensed to Anthos MAA868, an antibody directed at Factor XI and XIa, key components of the intrinsic coagulation pathway. A large unmet medical need exists for next-generation anti-thrombotic therapies in patients currently underserved by conventional anti-coagulant therapies.
Using fractions at different concentrations (4.1 [right arrow] 83.3 [micro]g well-[plate.sup.-1]) (Rodrigues et al., 2016; Salles et al., 2017; Rodrigues et al., 2017b), our results showed that sulfate differentially interfered with the TG response in 60-fold diluted human plasma activated by cephalin (intrinsic coagulation pathway) as recorded continually at 37[degrees]C for 60 min., in comparison with UHEP used as a reference.
This in vitro inhibition degree of the fractions on the intrinsic coagulation pathway of TG stimulated by cephalin did not occur on the same elution order, where fraction Cc-SP3 (eluted at 1 M NaCl) with high sulfation exhibited almost equal inhibitory effects compared with the fraction Cc-SP1, which revealed a comparatively lower sulfation.
In the present study, we have shown that the combination of 20% mannitol and 3% HS does not affect the intrinsic coagulation pathway at doses used intraoperatively for anti-oedematous therapy according to data obtained from the InTEM analysis.
The APTT was shortened, and the plasma FIB level was decreased when the rats were exposed to seawater, suggesting that the extrinsic coagulation pathway was inhibited and that the intrinsic coagulation pathway was initiated (Figure 3(a)).
Partial thromboplastin time (PTPT): On addition of phospholipids or surface active dispersed particles and calcium ions, thrombin formation occurs via the intrinsic coagulation pathway. Thrombin then induces the conversion of fibrinogen to fibrin.
In addition, all patients were screened by several laboratory tests, including measurement of the complete blood count (CBC), including platelet count; prothrombin time (PT) to evaluate the extrinsic coagulation pathway (factor II, V, VII, and X activity), which were converted to calculate the International Normalized Ratio (INR) (7); and activated partial thromboplastin rime (aPTT) to evaluate the intrinsic coagulation pathway (factor VIII, IX, XI, and XII activity).
This fibrin clot forms via (1) the intrinsic coagulation pathway, when activated factor XII (FXIIa) binds to the exposed endothelial cells at the site of injury and (2) the extrinsic coagulation pathway, when small amounts of circulating FVIIa bind to tissue factor released from injured endothelial tissues.